Day County climate

Day County Weather in May

NOAA 1991-2020 normals for Webster, 7.6 km from Day County

Average highs run from 60°F on May 1 to 72°F on May 31, and lows from 39°F to 51°F. Normal precipitation for the month is 3.39 in over about 10 wet days.

May day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at Day County, in °F, with the record for each date.020406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

May at a glance

Average high
66°F
Average low
45°F
Precipitation
3.39 in
Record high
109°FMay 30, 1934
Record low
17°FMay 1, 1961
Chance of a freeze
64%
Daylight
14 h 18 min to 15 h 25 min
Cloud cover
65%
Humidity
65%
Dew point
43°F
Wind
12.5 mph

Every day of the month

A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.

DateNormal highNormal lowRecord highRecord lowChance wetChance of snow
May 160°F39°F98°F 195917°F 196126%
May 261°F39°F92°F 195520°F 196726%
May 361°F40°F90°F 195217°F 192627%
May 462°F40°F96°F 192621°F 192927%
May 562°F40°F92°F 192618°F 192928%
May 662°F41°F90°F 200017°F 192528%
May 763°F41°F96°F 191621°F 198228%
May 863°F42°F102°F 193422°F 198029%
May 964°F42°F89°F 193422°F 192329%
May 1064°F43°F91°F 198720°F 199029%
May 1165°F43°F87°F 202517°F 194629%
May 1265°F44°F92°F 202517°F 194630%
May 1365°F44°F94°F 189424°F 198830%
May 1466°F44°F95°F 200120°F 192130%
May 1566°F45°F95°F 189422°F 195930%
May 1667°F45°F99°F 193423°F 192930%
May 1767°F46°F95°F 193424°F 192531%
May 1867°F46°F94°F 193426°F 191531%
May 1968°F47°F94°F 192529°F 191531%
May 2068°F47°F94°F 192523°F 196731%
May 2169°F48°F93°F 196424°F 192432%
May 2269°F48°F90°F 198020°F 196332%
May 2369°F48°F91°F 192830°F 192432%0%
May 2470°F49°F91°F 192622°F 192433%0%
May 2570°F49°F92°F 192624°F 192433%0%
May 2670°F50°F95°F 198028°F 196133%0%
May 2771°F50°F96°F 196929°F 192833%0%
May 2871°F50°F103°F 193428°F 196533%0%
May 2971°F51°F98°F 193424°F 194734%0%
May 3072°F51°F109°F 193429°F 194734%0%
May 3172°F51°F100°F 193433°F 196434%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Day County, in percent, and of at least 0.1 inch of snowfall.0102030401102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CDT).

May 1
sunrise 6:19 AM, sunset 8:37 PM
May 31
sunrise 5:46 AM, sunset 9:11 PM

Every day of May: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00399004 (Webster), public domain. Records: NOAA GHCN-Daily, station USC00391049, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.